mix mixing station identification card shall meet the following requirements

(A) mixing machine concrete mix signage should be hung prominently in the operating room before, Stationary conacrete plant. Signage production and installation should comply with "safe and civilized railway construction project site sign" - Iron know 16 requirements. (2) identification card shall include design and construction of concrete mix, time, aggregate calculations and stationary concrete batching plant, the amount of each plate of various materials, slump and so on.